2 * Copyright (c) 2014 Andrew Turner
3 * Copyright (c) 2014-2015 The FreeBSD Foundation
6 * This software was developed by Andrew Turner under
7 * sponsorship from the FreeBSD Foundation.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 #ifndef _MACHINE_SETJMP_H_
34 #define _MACHINE_SETJMP_H_
36 #include <sys/cdefs.h>
40 * - A magic value to differentiate the buffers
43 * - 11 general purpose registers
44 * - 8 floating point registers
45 * - The signal mask (128 bits)
46 * i.e. 24 64-bit words, this can be rounded up to 32 to give us some
47 * space to expand into without affecting the ABI.
48 * XXX: Is this enough space for expansion?
50 * The registers to save are: r19 to r29, and d8 to d15.
53 #define _JB_SIGMASK 21
55 /* This should only be needed in libc and may change */
57 #define _JB_MAGIC__SETJMP 0xfb5d25837d7ff700
58 #define _JB_MAGIC_SETJMP 0xfb5d25837d7ff701
63 * jmp_buf and sigjmp_buf are encapsulated in different structs to force
64 * compile-time diagnostics for mismatches. The structs are the same
65 * internally to avoid some run-time errors for mismatches.
67 #if __BSD_VISIBLE || __POSIX_VISIBLE || __XSI_VISIBLE
68 typedef struct _sigjmp_buf { long _sjb[_JBLEN + 1]; } sigjmp_buf[1];
71 typedef struct _jmp_buf { long _jb[_JBLEN + 1]; } jmp_buf[1];
72 #endif /* __ASSEMBLER__ */
74 #endif /* !_MACHINE_SETJMP_H_ */